nmdb - A multiprotocol network database

About

nmdb is a network database (dbm-style) for controlled networks that can use
different protocols to communicate with its clients. It supports
TIPC, TCP, UDP and
SCTP.

It consists of an in-memory cache that saves (key, value) pairs, and a
persistent backend that stores the pairs on disk.
Both work combined, but the use of the backend is optional, so you can use the
server only for cache queries, pretty much like
memcached.

As memcached, it supports client-side distribution of queries, although
replication is not implemented yet.

A library is provided to interact with the database and the cache in a very
simple way.
Python (both 2 and 3),
D,
NewLISP,
Ruby,
Bigloo Scheme,
and Haskell bindings are also available and
come with the distribution (although except for the Python bindings, the rest
are not widely tested).